#include <stdio.h>   /*预处理*/
int main()           /*主函数*/
{
    int n,s;         /*定义变量*/
    char ch,x;

    printf("Please input the secret KEY:");
    scanf("%d",&n);
    getchar();      /*清除缓冲区*/
    printf("Please input a character:");
    scanf("%c",&ch);

    s=(n%26+26)%26;  /*取模操作保证索引在0-25之间*/

    
    printf("The encrypted character is:%c\n",x);
    return 0;
}